Analysis of debris flow control effect and hazard assessment in Xinqiao Gully,Wenchuan M_(s)8.0 earthquake area based on numerical simulation  

作　　者：Chang Yang Yong-bo Tie Xian-zheng Zhang Yan-feng Zhang Zhi-jie Ning Zong-liang Li 

机构地区：[1]Chinese Academy of Geological Sciences,Beijing 100037,China [2]Chengdu Center of China Geological Survey,China Geological Survey,Chengdu 610081,China [3]Technology innovation center for risk prevention and mitigation of geohazard,Ministry of Natural Resources,Chengdu 611734,China [4]Observation and Research Station of Chengdu Geological Hazards,Ministry of Natural Resources,Chengdu 610000,China

出　　处：《China Geology》2024年第2期248-263,共16页中国地质（英文）

基　　金：supported by the project of the China Geological Survey(No.DD20221746);the National Natural Science Foundation of China(Grant Nos.41101086)。

摘　　要：Xinqiao Gully is located in the area of the 2008 Wenchuan M_(s)8.0 earthquake in Sichuan province,China.Based on the investigation of the 2023"6-26"Xinqiao Gully debris flow event,this study assessed the effectiveness of the debris flow control project and evaluated the debris flow hazards.Through field investigation and numerical simulation methods,the indicators of flow intensity reduction rate and storage capacity fullness were proposed to quantify the effectiveness of the engineering measures in the debris flow event.The simulation results show that the debris flow control project reduced the flow intensity by41.05%to 64.61%.The storage capacity of the dam decreases gradually from upstream to the mouth of the gully,thus effectively intercepting and controlling the debris flow.By evaluating the debris flow of different recurrence intervals,further measures are recommended for managing debris flow events.

关 键 词：Landslide Debris flow Hazard assessment Numerical simulation OpenLISEM Prevention and control project Wenchuan M_(s)8.0 earthquake Xinqiao Gully Sichuan province Geological hazards survey engineering 

分 类 号：P642.23[天文地球—工程地质学]